title: Dimethyl 3,3'-(phenyl-methyl-ene)bis-(1H-indole-2-carboxyl-ate).
abstract: In the title compound, C27H22N2O4, the two indole ring systems are approximately perpendicular to each other, with a dihedral angle of 84.5 (5)° between their planes; the benzene ring is twisted with respect to the two indole ring systems at angles of 78.5 (5) and 86.5 (3)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, weak C-H⋯O and C-H⋯N hydrogen bonds, and C-H⋯π inter-actions into a three-dimensional supra-molecular architecture.
authors.affiliation: Chemical Engineering Department, Nanjing College of Chemical Technology, Geguan Road No. 265 Nanjing, Nanjing 210048, People's Republic of China.
authors.forename: Hong-Shun
authors.initials: HS
authors.lastname: Sun
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Li
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Zhang